Abstract: The invention relates to a pipe rolling plant 10 comprising a rotary piercer 20, a treatment station 30 and a main rolling mill 40. The rotary piercer and the treatment station are arranged so that the pierced blank 51 leaving them is arranged with the irregular tail 511 facing the main rolling mill 40 and with the regular head 510 facing the mandrel 41. The invention also relates to a rolling mill 40 comprising a plurality of rolling stations 43, each station comprising a plurality of rolling rolls 42, the radial position h of which is adjustable. The rolling mill also comprises a control circuit for calculating and/or measuring the distance d between the axes of rotation r of the rolls and the trailing edge 520 of the pipe 52. The control circuit is also designed to displace the rolling rolls radially towards the outside of the pipe in each rolling station 43n when the distance d assumes a predetermined value d0.

Abstract: A re-turning plant for rollers of rolling mills of the type comprising at least one roller stand and a plurality of rollers mounted to respective arms pivoting in the plane of the roller stand about respective pins that are fixed to the roller stand. The rollers are positioned within the roller stand in a work position in which work surfaces of the rollers determine the outer profile of a body to be rolled. The re-turning plant comprises a support structure configured to support the whole roller stand in a turning position, a tool-holding device that can be displaced in contact with the work surfaces of each roller fixed in the roller stand and mandrel means with means that can be rotatably coupled to each roller of the plurality of rollers fixed to the roller stand to rotate the same substantially in the work position.

Abstract: A re-turning plant (1) for rollers (7) of rolling mills of the type comprising at least one roller stand (1) and a plurality of rollers (7) mounted to respective arms (6) pivoting in the plane of the roller stand (1) about respective pins (8) that are fixed to the roller stand (1), the rollers (7) being positioned within the roller stand (1) in a work position in which work surfaces (9) of the rollers (7) determine the outer profile of a body to be rolled, wherein the re-turning plant (1) comprises a support structure (12) configured to support the whole roller stand (1) in a turning position, a tool-holding device (13) that can be displaced in contact with the work surfaces (9) of each roller (7) of the plurality of rollers (7) fixed in the roller stand (1) and mandrel means (14) with means (15, 16) that can be rotatably coupled to each roller (7) of the plurality of rollers (7) fixed to the roller stand (1) to rotate the same substantially in the work position.